Centerboard.



PATENTED MAY 31, 1904.

G. B. WAINEWRIGHT.

GENTERBOARD. APPLICATION FILED 00T.1, 190s.

I0 MODEL.

Inventor 6, Y VE/hcwrgZC Witnesses Attorney Nomus warms to. Puofquwoz. wAsHmcTou o r UNITED, STATES scatented. May 31, 1904.

PATENT OFFICE.

CENTERBOARD.

SPECIFICATION forming part of Letters Patent No. 761,115, dated May 31, 1904.

Application filed October 1,1903. Serial at. 175,395. (No model.)

To all whom it may-concern:

Be it known that I, CLAUDE B. WAINE- WRIGHT, a subject of the King of Great Britain, residing at Vancouver, British Columbia, Dominion of Canada, have invented certain new and useful Improvements in Centerboards; and I do declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use the same.

My invention is an improved centerboard for vessels; and it consists in the construction and combination of devices hereinafter described and claimed.

The object of my invention is to provide a centerboard which when lowered is very much longer than the box in which it is incased when raised, so as to provide a centerboard of maximum effective area and which when not in use forms a minimum obstruction in the vessel.

In the accompanying drawings, Figure 1 is a longitudinal section view of the midship portion of a vessel provided with my improved centerboard, the latter being shown raised and incased in the box or well. Fig. 2 is a similar view showing the centerboard lowered. Fig. 3 is avertical transverse sectional view of the same.

In accordance with my inventionI construct my improved centerboard of a plurality of slidably -related sections movable longitudinally with reference to each other while being lowered, so that the centerboard is extended longitudinally while being lowered from its box or well and contracted longitudinally when being raised therein, in order that the centerboard may be of much more eifective longitudinal area than the box or well in which it is incased when not in use.

In the embodiment of my invention here shown the section 1 is a housing-section in which the section 2, which is slidably related thereto, is incased almost entirely when the centerboard is raised. These sections of the centerboard may be of any suitable size and shape, the drawings showing a suitable form thereof. The housing-section 1 is contracted in length toward its upper side, and to the ends of its contracted upper side are pivotally connected the lower ends of a pair of supporting-links 3, the upper ends of which are pivotally supported, as at 4, within the upper portion of the centerboard box or well 5. The section 2 enters the space between the sides of the housingsection 1, is slidably related thereto, and extensible therefromthat is to say, it is adapted to be drawn out of the housing-section as the two sections are lowered and to be moved into the same as the two sections are raised.

It will be observed by reference to the drawings that the length of the centerboard box or well 5 only exceeds that of one of the centerboard-sections and is very much less than the combined lengths of the two sections when they are extended by lowering, so that the box or well forms an obstruction of minimum size in the hull of the vessel, while the centerboard is of maximum size. The section 2 has its inner portion supported by the housing-section, in which it is slidable. Its outer or end portion is supported by a link 6, which is pivotally connected thereto, as at 7 and is also pivotally supported in the box or well, as at 8, and the said section 2 is formed or provided with a stop 9, which when the centerboard is lowered engages the inner side of the link 6 and causes the latter to hang at such an angle as to properly support the outer end of the section 2.

A suitable rod or cord (shown at 10) is attached to the link 3 near the lower end thereof and passes upwardly through an opening 11 in the top of the box or Well. The said rod or cord may be attached to any suitable portion of the housing-section, if preferred, and any suitable means may be employed for raising or lowering the sections of the centerboard. I do not limit myself in this particular.

From the foregoing, description, taken in connection with the accompanying drawings,

the construction and operation of the invention will be readily understood without requiring a more extended explanation.

Various changes in the form, proportion, and the minor details of construction may be resorted to without departing from the principle or sacrificing any of the advantages of this invention.

Having thus fully described my invention, what I claim as new, and desire to secure by Letters Patent, is

1. A centerboard comprising overlapping, longitudinally-movable sections, and swinging supporting-links suspending said sections, whereby said sections move outwardly in opposite directions simultaneously and increase the length of the centerboard when lowered, substantially as described;

2, A center-board having a housing-section, a section slidably related thereto and movable endwise therein, a plurality of swinging links supporting the housing-section, and a swinging link supporting one end of the other section, the opposite end of the last-mentioned section being supported by the housing-section.

3. A centerboard comprising a plurality of longitudinally-slidable sections and supporting-links therefor, one of said sections having a stop to coact with one of said links to limit the movement of said sections-in one direction.

4. A centerboard comprising slidably-re lated sections longitudinally extended in op posite directions when lowered. in combination with an incasing box or well, a plurality of supporting-links for one of the centerboard-sections, and a supporting-link for the outer end of the other centerboard-section, the inner end of the last-mentioned section being supported by the other section.

In testimony whereof I have hereunto set my hand in presence of two subscribing witnesses.

CLAUDE B. WAINEWRIGHT. 

